Zoysiagrass plant named &#39;L1F&#39;

ABSTRACT

An asexually reproduced variety of perennial  zoysiagrass  with a unique combination of morphological characters including medium to fine leaf blade width, low canopy height, and soft leaf texture.

CROSS-REFERENCE TO RELATED APPLICATIONS

“Not Applicable”

STATEMENT REGARDING FEDERALLY SPONSORED RESEARCH OR DEVELOPMENT

“Not Applicable”

LATIN NAME OF THE GENUS AND SPECIES OF THE PLANT CLAIMED

The present invention relates to the genus and species Zoysia japonica (L.) Merr.

VARIETY DENOMINATION ‘L1F’ BACKGROUND OF THE INVENTION

1. Field of Invention

The present invention relates to a new and distinct asexually reproduced variety of perennial zoysiagrass (Zoysia japonica (L.)) Merr.

BRIEF SUMMARY OF THE INVENTION

This invention relates to a new and distinct perennial zoysiagrass cultivar identified as ‘L1F’ zoysiagrass (herein referred to as ‘L1F’). The inventors, David L. Doguet and Virginia G. Lehman, discovered ‘L1F’ under cultivated conditions near Poteet, Tex. in a collection of plants from Kobe, Japan made by Jack Murray (deceased). ‘L1F’ was identified as a distinctly different vegetative patch or clonal plant differing from the surrounding plants in a medium to fine leaf texture, sparse flowering, and a rapid lateral growth rate. The inventors asexually reproduced ‘L1F’ by taking vegetative cuttings of stolons and rhizomes, cutting the rhizomes and stolons into segments, each with a vegetative bud, and rooting them in potting media. ‘L1F’ zoysiagrass will be used as a turfgrass suitable for home lawns, sports fields, and golf courses.

For purposes of registration under the “International Convention for the Protection of New Varieties of Plants” (generally known by its French acronym as the UPOV Convention) and noting Section 1612 of the Manual of Plant Examining Procedure, it is proposed that the title of the invention is zoysiagrass plant named ‘L1F’.

BRIEF DESCRIPTIONS OF THE ILLUSTRATIONS

FIG. 1. Tiller of ‘L1F’ zoysiagrass.

FIG. 2. Inflorescence of ‘L1F’ zoysiagrass.

COMPLETE BOTANICAL DESCRIPTION OF THE VARIETY

‘L1F’ was characterized in greenhouse and field conditions. ‘L1F’ is a unique variety of zoysiagrass (Zoysia japonica (L.)) Merr. that was discovered under cultivated conditions. The inventors, David L. Doguet and Virginia G. Lehman, discovered ‘L1F’ in a collection of plants from Kobe, Japan made by Jack Murray (deceased) that was planted near Poteet, Tex. in 1998. ‘L1F’ was identified as a distinctly different vegetative patch or clonal plant differing from the surrounding plants in a medium to fine leaf texture, sparse flowering, and a rapid lateral growth rate. The plants were located in USDA Plant Hardiness Zone 8. The inventors asexually reproduced ‘L1F’ in both Poteet, Tex. and Lebanon, Oreg. by taking vegetative cuttings of stolons and rhizomes, cutting the rhizomes and stolons into segments, each with a vegetative bud, and rooting them in potting media. Planting of the rooted material provided planting stock for studying performance and for comparison of morphological characters after propagation. ‘L1F’ has been propagated by rhizomes, stolons, tillers, and sod. Asexually reproduced plants of ‘L1F’ have remained stable and true to type through successive generations of propagation. No seedling establishment from ‘L1F’ has been noticed in either greenhouse or field studies.

‘L1F’ is a perennial zoysiagrass that spreads by both stolons and rhizomes. Characteristics of ‘L1F’ measured in 2013 were taken from plants that were approximately 12 months in age. The greenhouse was located near Lebanon, Oreg., with a nighttime low temperature of 50 degrees F., and daytime high of 80 degrees F., and a minimum soil temperature of 77 degrees F. The plants were grown with a minimum 14-hour day length, supplemented with photosynthetically active radiation equivalent to approximately 50% sunlight. The plants were fertilized with the equivalent of 1 pound of actual N per month, using a soluble fertilizer of 20-20-20 in two equal soluble applications per month.

‘L1F’ has a medium-fine leaf texture with a leaf length longer than ‘Diamond’ (U.S. Plant Pat. No. 10,636) but shorter than ‘Cavalier’ (U.S. Plant Pat. No. 10,778) and ‘Zorro’ (U.S. Plant Pat. No. 14,130) (Table 1). ‘L1F’ has an absence of leaf hairs versus ‘Palisades’ (U.S. Plant Pat. No. 11,515), ‘Zorro’ (U.S. Plant Pat. No. 14,130), ‘Crowne’ (U.S. Plant Pat. No. 11,570), and ‘Cavalier’ (U.S. Plant Pat. No. 10,778) which each have many leaf surface hairs (Table 2). ‘L1F’ has a thicker youngest stolon node and longer stolon internode lengths than ‘Diamond’ (U.S. Plant Pat. No. 10,636) (Table 3). ‘L1F’ has a shorter unmown canopy height than ‘Cavalier’ (U.S. Plant Pat. No. 10,778) or ‘Zorro’ (U.S. Plant Pat. No. 14,130) (Table 4), but lacks the winterhardiness of ‘Zorro’ (U.S. Plant Pat. No. 14,130) or ‘Meyer’ (unpatented) when grown in Kansas (Table 5). ‘L1F’ has not shown susceptibility to the zoysiagrass mite when tested at Poteet, Tex., where susceptible varieties have shown the coachwhip leaf symptoms of the mite. ‘L1F’ has shown good turfgrass performance and temperature adaptation when tested as far north as Beltsville, Md., USDA hardiness zone 7a, which would extend the area of adaptation for ‘L1F’ in a line from northern Maryland across central Tennessee through northern Arkansas through Oklahoma in an East/West line and on a North/South line from Washington D.C., south through Mexico. ‘L1F’ will be limited only by winter survival in colder regions. ‘L1F’ is similar to most fine to medium fine textured zoysiagrasses in water use demands as shown in test situations near Poteet, Tex., and will be limited by adequate precipitation in drier to arid regions. ‘L1F’ is adapted from sandy to heavier loam soil textures and from slightly acid to slightly alkaline soil pH.

TABLE 1 Leaf blade widths and lengths and texture class of selected zoysiagrass cultivars, measured under greenhouse conditions in Lebanon, OR, 2012-2013. Length, 2nd Width, 2nd youngest youngest Leaf Leaf crown leaf crown leaf Texture Variety Stiffness --cm-- --mm-- Class ‘L1F’ Very Soft 3.02 1.60 Medium Fine ‘LR1’ Medium 3.67 3.27 Medium Stiff ‘LR2’ Medium 2.96 2.61 Medium Stiff ‘Diamond’ Soft 2.50 1.40 Very Fine ‘Cavalier’ Medium 3.78 1.94 Medium Fine Stiff Zorro Medium 4.30 1.74 Medium-Coarse Stiff Lsd, p = 0.05 1.03 0.24

TABLE 2 Adaxial leaf hair presence or absence of selected zoysiagrass cultivars, measured under greenhouse conditions in Lebanon, OR, 2012-2013. Leaf hair, adaxial Presence/ Variety Number ‘L1F’ Absent ‘Palisades’ Many ‘Zorro’ Many ‘Diamond’ Absent ‘Royal’ Absent ‘Crowne’ Many ‘Cavalier’ Many

TABLE 3 Stolon characters of selected zoysiagrass cultivars, measured under greenhouse conditions in Lebanon, OR, 2012-2013. Thickness Thickness Stolon Stolon Stolon 1^(st) 2nd Internode Internode Internode youngest youngest length, length, length, stolon stolon 1^(st) to 2^(nd) 2nd to 3^(rd) 3rd to node node node node 4th node Variety -mm- -mm- -cm- -cm- -cm- ‘L1F’ 1.72 1.78 1.35 1.31 1.33 ‘Cavalier’ 1.65 1.57 1.22 1.38 1.38 ‘Diamond’ 1.44 1.49 1.0 0.94 1.86 ‘Zorro’ 1.57 1.67 1.51 1.47 1.45 Lsd, p = 0.05 0.16 0.38 0.34 0.28 0.31

TABLE 4 Leaf and canopy characters of selected zoysiagrass cultivars, measured under greenhouse conditions in Lebanon, OR, 2012-2013. Canopy Width, 4th youngest height crown leaf Variety --cm-- --mm-- ‘L1F’ 7.01 1.49 ‘LR1’ 6.62 2.69 ‘LR2’ 7.32 2.18 ‘Diamond’ 7.24 1.15 ‘Cavalier’ 10.8 1.55 ‘Zorro’ 11.09 1.41 Lsd, p = 0.05 1.76 0.71

TABLE 5 Characteristics of zoysiagrass from the NTEP trial. Characteristics rated on a scale of 1-9 with 9 = best color or finest texture. Winterkill rated on a scale of 1 to 100, with 100 equal to complete winterkill in Kansas. Mole cricket damage rated 1-9, with 9 = no damage. Diseases rated 1-9, with 9 = no disease. Leaf Large brown Dollar spot Mole Cricket texture Spring WinterKill in patch rating Rating Damage rating Greenup Kansas (1) (2) (1) Year Name 2008 2008 2008 2012 2008-12 2007-12 ‘L1F’ 7.8 2.4 99 7.0 6.8 6.8 ‘Shadowturf’ 7.7 2.3 99 6.5 6.9 6.5 ‘DALZ 0701’ 7.5 3.8 66.7 7.0 5.1 5.5 ‘Dynasty’ 7.4 2.7 96.3 • • • ‘DALZ 0702’ 7.4 3.5 68.3 6.5 5.7 6.3 ‘Zorro’ 7.2 4.2 14.7 5.5 6.5 6.5 ‘380-1’ 6.9 5.2 26.7 5.5 8.2 7.2 ‘Meyer’ 5.7 5.5 0 4.5 8.6 6.3 ‘240’ 5.3 5.3 0 4.0 8.6 5.8 ‘29-2’ 5.3 6.4 0 4.3 8.5 5.7 ‘Zenith’ 4.6 5.7 5 3.5 8.7 6.5 Lsd, p = 0.05 0.3 0.6 10.6 1.3 0.8 1.6 1) Gainesville, FL 2) Raleigh, NC

-   Origin: ‘L1F’ is a cultivar of a single clone discovered under     cultivated conditions in a Poteet, Tex. planting of zoysiagrass     clones derived from a collection of zoysiagrasses from Kobe, Japan     made by Jack Murray (deceased). -   Classification: Zoysia japonica (L.) Merr. -   Growth habit: ‘L1F’ is a perennial plant that spreads by stolons and     rhizomes and produces a dense, fine textured turfgrass. The     inflorescence of ‘L1F’ is a terminal spike-like raceme, with     spikelets on short pedicels. -   Leaf blade: rolled in the bud, flat surface -   Leaf blade pubescence: No hairs on abaxial or adaxial leaf -   Leaf sheath pubescence: absent except for long hairs at mouth of     sheath;     -   -   ‘L1F’ mean length sheath mouth hairs.—1.2 mm; Diamond 1.0             mm. -   Leaf blade margin: ‘L1F=slight roughness; BM230=rough;     Cavalier=mostly smooth -   Leaf blade veins: prominent -   Leaf blade flexibility (softness): soft -   Vegetative leaf, 2nd youngest vegetative leaf:     -   -   Blade length range.—‘L1F’: 2.7 cm to 4.8 cm, mean length:             3.02 cm.         -   Blade width mean.—‘L1F’: 1.4 mm to 1.88 mm, mean width: 1.6             mm.         -   ‘Zorro’ mean width.—1.74 mm; ‘Diamond’ mean width: 1.4 mm. -   Sheath length, 4^(th) youngest vegetative leaf:     -   -   Mean length ‘L1F’.—4.0 cm; ‘Diamond’ mean length: 2.93 cm. -   Stolon leaf angle, third youngest leaf: ‘L1F’: 60; ‘Cavalier’:76;     ‘Diamond’: 52 -   Inflorescence characters: -   Culm total length, including floral area to node below flag leaf:     24.3 mm     -   -   Length of stem of inflorescence.—14.3 mm.         -   Floral area length.—10.7 mm. -   Culm width, stem thickness, base of floral area: 0.77 mm -   Anther length: 1.0 mm -   1^(st) Glume: Lacking -   2^(nd) glume width: 0.6 mm -   2^(nd) glume length: 3.5 mm -   Spikelet number per inflorescence: 12.8 -   Spikelet length: 3.2 mm -   Spikelet width: 0.4 mm; Note that the spikelet is only slightly     smaller than the 2^(nd) glume because the 2^(nd) glume enfolds the     lemma with the palea apparently absent -   Peduncle width: 0.5 mm -   Peduncle length: 29.3 mm -   Node thickness, node below flag leaf: 0.75 mm -   Pedicel length: 2.0 mm -   Flag leaf length: ‘L1F’: 15.0 mm -   Flag leaf width: ‘L1F’: 1.0 mm; -   Inflorescence emergence: ‘L1F’ has sparse flowering in Poteet, Tex.     from late April through October -   Mature plant height, including inflorescence: 6 to 7 cm; -   Color notations, vegetative characters, based on The R.H.S. Colour     Chart, 2001 (light quality, photoperiod, and general growth of the     plants affect color notations):     -   -   Leaf blade color adaxial leaf surface.—138A green.         -   Leaf blade color abaxial leaf surface.—138A green.         -   Stolon color.—161C, 161A greyed yellow. -   Color notations, floral characters, based on The R.H.S. Colour Chart     (light quality, photoperiod, and general growth of the plants affect     color notations):     -   -   Culm stalk.—145C yellow green.         -   Stigma.—155B white.         -   Anther color, fresh.—155A white.         -   Anthers, mature, dried.—158B yellow-white. -   Turf quality (rated 1-9, 9 best): ‘L1F’: 6; ‘Meyer’: 5; Stolon     density: similar to Diamond (U.S. Plant Pat. No. 10,636); more than     Cavalier (U.S. Plant Pat. No. 10,778) 

I claim:
 1. A new and distinct variety of zoysiagrass plant, substantially as described and illustrated herein, characterized particularly by a unique combination of morphological characters. 